Ac-dc is a term used to describe something that can function in both directions. It is often used in reference to electrical currents that can flow in both directions. However, the term ac-dc can also be used to describe other things such as people's personalities or actions. For example, someone who is unpredictable and can act in both positive and negative ways can be described as ac-dc. Alternatives to the term ac-dc include versatile, adaptable, ambidextrous, multifaceted, and flexible. These synonyms are useful for describing a wide range of topics beyond just electrical currents and can be used in various contexts to describe different characteristics or actions.